The paper argues that there are effectively only two tenable theories of the mind?brain relationship: ?epiphenomenalism? and ?radical dualism? (interactionism). So long as account is taken only of the conventional sciences, the odds are heavily stacked in favour of epiphenomenalism. However, once the findings of parapsychology are admitted to consideration, a very different situation obtains. It is here argued that parapsychology only makes sense within a dualist metaphysic